We have fabricated a single Cooper-pair box (SCB) together with an on-chip lumped element resonator. By utilizing the quantum capacitance of the SCB, its state can be read out by detecting the phase of a radio-frequency signal reflected off the resonator. The resonator was optimized for fast readout. By studying quasiparticle tunneling events in the SCB, we have characterized the performance of the readout and found that we can perform a single-shot parity measurement, with a signal-to-noise ratio of 1, in approximately 50 ns. This is an order of magnitude faster than previously reported measurements.

Dela på webben

Skapa referens, olika format (klipp och klistra)

BibTeX @article{Persson2010,author={Persson, Fredrik and Wilson, Christopher and Sandberg, Martin and Delsing, Per},title={Fast readout of a single Cooper-pair box using its quantum capacitance},journal={Physical Review B},issn={1098-0121},volume={82},issue={13},pages={Article Number: 134533 },abstract={We have fabricated a single Cooper-pair box (SCB) together with an on-chip lumped element resonator. By utilizing the quantum capacitance of the SCB, its state can be read out by detecting the phase of a radio-frequency signal reflected off the resonator. The resonator was optimized for fast readout. By studying quasiparticle tunneling events in the SCB, we have characterized the performance of the readout and found that we can perform a single-shot parity measurement, with a signal-to-noise ratio of 1, in approximately 50 ns. This is an order of magnitude faster than previously reported measurements.},year={2010},keywords={state, junctions },}

RefWorks RT Journal ArticleSR ElectronicID 129215A1 Persson, FredrikA1 Wilson, ChristopherA1 Sandberg, MartinA1 Delsing, PerT1 Fast readout of a single Cooper-pair box using its quantum capacitanceYR 2010JF Physical Review BSN 1098-0121VO 82IS 13AB We have fabricated a single Cooper-pair box (SCB) together with an on-chip lumped element resonator. By utilizing the quantum capacitance of the SCB, its state can be read out by detecting the phase of a radio-frequency signal reflected off the resonator. The resonator was optimized for fast readout. By studying quasiparticle tunneling events in the SCB, we have characterized the performance of the readout and found that we can perform a single-shot parity measurement, with a signal-to-noise ratio of 1, in approximately 50 ns. This is an order of magnitude faster than previously reported measurements.LA engDO 10.1103/PhysRevB.82.134533LK http://dx.doi.org/10.1103/PhysRevB.82.134533 LK http://publications.lib.chalmers.se/records/fulltext/local_129215.pdfOL 30